Overview
Mr. Lucky is a 1943 romance film directed by H.C. Potter, starring Cary Grant and Laraine Day. It recounts the tale of an attraction between a shady gambler and a wealthy socialite in the days prior to the United States entering World War II.
Plot
Swede rows up to a public dock in a dinghy. He hides when he spots a young woman who walks to the end of the pier. When a new night watchman (an uncredited Emory Parnell) notices her, Swede stops him from bothering her. The sailor begins recounting her story, and the film segues into a long flashback.
Joe "the Greek" Adams is a gambler and grifter with a couple of problems. First, he and his treacherous partner Zepp have received draft notices to join the army in preparation for World War II. However, one of his underlings, Joe Bascopoulos, has just died, and his status was 4F (unfit to serve). So one of them can dodge the draft by assuming his identity. They gamble for it; Zepp cheats, but Joe still wins. Zepp fails his physical examination anyway.
The other problem is a lack of money to bankroll his gambling ship. He talks the head of the local War Relief organization, Captain Veronica Steadman, into authorizing him to run a "charity" casino, promising to raise enough money to outfit a relief ship, despite the suspicions of her lieutenant, wealthy socialite Dorothy Bryant.
From Wikipedia (CC BY-SA 4.0).